Lint for `@mustCallSuper` (#194).

lib/src/rules.dart

Index: lib/src/rules.dart
diff --git a/lib/src/rules.dart b/lib/src/rules.dart
index 7f18028470d41a2c7fa6a0504c6d26de92ae9c8d..097c12da5a5ddb0725d537b7e3b9a801716198ff 100644
--- a/lib/src/rules.dart
+++ b/lib/src/rules.dart
@@ -22,6 +22,7 @@ import 'package:linter/src/rules/hash_and_equals.dart';
 import 'package:linter/src/rules/implementation_imports.dart';
 import 'package:linter/src/rules/library_names.dart';
 import 'package:linter/src/rules/library_prefixes.dart';
+import 'package:linter/src/rules/must_call_super.dart';
 import 'package:linter/src/rules/non_constant_identifier_names.dart';
 import 'package:linter/src/rules/one_member_abstracts.dart';
 import 'package:linter/src/rules/package_api_docs.dart';
@@ -52,6 +53,7 @@ final Registry ruleRegistry = new Registry()
   ..register(new HashAndEquals())
   ..register(new ImplementationImports())
   ..register(new LibraryNames())
+  ..register(new MustCallSuper())
   ..register(new LibraryPrefixes())
   ..register(new NonConstantIdentifierNames())
   ..register(new PreferIsNotEmpty())